From owner-freebsd-hackers Thu Jun 17 13:51:32 1999 Delivered-To: freebsd-hackers@freebsd.org Received: from allegro.lemis.com (allegro.lemis.com [192.109.197.134]) by hub.freebsd.org (Postfix) with ESMTP id C3CB7155A4 for ; Thu, 17 Jun 1999 13:51:27 -0700 (PDT) (envelope-from grog@freebie.lemis.com) Received: from freebie.lemis.com (freebie.lemis.com [192.109.197.137]) by allegro.lemis.com (8.9.1/8.9.0) with ESMTP id GAA06269; Fri, 18 Jun 1999 06:21:26 +0930 (CST) Received: (from grog@localhost) by freebie.lemis.com (8.9.3/8.9.0) id GAA54090; Fri, 18 Jun 1999 06:21:34 +0930 (CST) Date: Fri, 18 Jun 1999 06:21:33 +0930 From: Greg Lehey To: Narvi Cc: "David E. Cross" , freebsd-hackers@FreeBSD.ORG Subject: Re: vinum performance Message-ID: <19990618062133.S9893@freebie.lemis.com> References: <19990617174823.O9893@freebie.lemis.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.95.4i In-Reply-To: ; from Narvi on Thu, Jun 17, 1999 at 10:36:49PM +0300 WWW-Home-Page: http://www.lemis.com/~grog X-PGP-Fingerprint: 6B 7B C3 8C 61 CD 54 AF 13 24 52 F8 6D A4 95 EF Organization: LEMIS, PO Box 460, Echunga SA 5153, Australia Phone: +61-8-8388-8286 Fax: +61-8-8388-8725 Mobile: +61-41-739-7062 Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Thursday, 17 June 1999 at 22:36:49 +0300, Narvi wrote: > > On Thu, 17 Jun 1999, Greg Lehey wrote: > >> On Thursday, 17 June 1999 at 11:10:08 +0300, Narvi wrote: >>> >>> On Thu, 17 Jun 1999, David E. Cross wrote: >>> >>>> I have a drive that is rated at ~16 Meg/second, and indeed it delivers on the >>>> order of 15+ Meg/second. If I use Vinum to create a concatinated device >>>> of 2 such units performance drops to 2.5 Meg/sec. This seems like a >>>> drastic drop in performance. Any ideas what I am doin incorrectly? >>> >>> Try changing stripe size. How big is it right now? >> >> This was a concatenated plex. > > Do we know that for a fact? I see no reason to doubt what he said. > It could be concatenated by striping. No, the organizations are concatenated, striped or RAID-5. One doesn't mean the other. > And no, i am not sure he was using vinum terminology (and he didn't > say plex anywhere). I don't know any other usage of the word "concatenated" in this connection. Greg -- See complete headers for address, home page and phone numbers finger grog@lemis.com for PGP public key To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message